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1. 发明授权

US5677801A Magnetic recording/reproducing apparatus for automatically adjusting a recording current in accordance with the wear of a read head 失效
标题翻译：磁记录/重放装置，用于根据读取头的磨损自动调节记录电流
公开(公告)号：US5677801A
公开(公告)日：1997-10-14
申请号：US593378
申请日：1996-01-29
申请人： Katsumi Fukuchi , Yasuyoshi Nishikawa , Hisashi Yamada
发明人： Katsumi Fukuchi , Yasuyoshi Nishikawa , Hisashi Yamada
IPC分类号： G11B5/00 , G11B5/02 , G11B20/10 , G11B27/36 , G11B5/09
CPC分类号： G11B27/36 , G11B20/10009 , G11B5/02 , G11B2005/0013
摘要： A magnetic recording/reproducing apparatus includes a write head for recording a signal on a magnetic recording medium, a recording amplifier for supplying a recording current corresponding to the signal to the write head, a read head for reproducing the signal recorded on the magnetic recording medium, a reproducing amplifier for generating a reproduced current corresponding to the signal, an equalizer for correcting a waveform of a reproduced signal reproduced by the read head, a distortion detector for detecting signal distortion reproduced by the read head, thereby obtaining a distortion evaluation value, and a recording current adjusting section for adjusting a magnitude of the recording current in a direction to decrease the distortion (i.e., in a direction to decrease the recording current) on the basis of a detection output obtained by the distortion detector. An optimum recording current is always supplied to the write head in accordance with the degree of wear of the write head. The degree of wear of the head is detected upon request, and head replacement is prompted.
摘要翻译：磁记录/再现装置包括用于在磁记录介质上记录信号的写入头，用于将对应于该信号的记录电流提供给写入头的记录放大器，用于再现记录在磁记录介质上的信号的读头，用于产生与该信号相对应的再现电流的再现放大器，用于校正由读取头再现的再现信号的波形的均衡器，用于检测由读取头再现的信号失真的失真检测器，从而获得失真评估值，以及记录电流调节部分，用于基于由失真检测器获得的检测输出，调整在减小失真的方向上的记录电流的大小（即，在降低记录电流的方向上）。根据写入头的磨损程度，始终将最佳记录电流提供给写入头。根据要求检测头的磨损程度，并提示换头。

2. 发明授权

US5325242A Magnetic recording/reproducing apparatus for decreasing an error rate in recording/reproducing a digital signal 失效
标题翻译：用于降低记录/再现数字信号中的错误率的磁记录/重放装置
公开(公告)号：US5325242A
公开(公告)日：1994-06-28
申请号：US953816
申请日：1992-09-30
申请人： Katsumi Fukuchi , Yasuyoshi Nishikawa , Hisashi Yamada
发明人： Katsumi Fukuchi , Yasuyoshi Nishikawa , Hisashi Yamada
IPC分类号： G11B5/09 , G11B5/02 , G11B5/035 , G11B5/455 , G11B20/10 , G11B27/36
CPC分类号： G11B5/455 , G11B20/10009 , G11B27/36 , G11B5/02 , G11B5/035
摘要： A magnetic recording/reproducing apparatus includes a write head for recording a signal on a magnetic recording medium, a recording amplifier for supplying a recording current corresponding to the signal to the write head, a read head for reproducing the signal recorded on the magnetic recording medium, a reproducing amplifier for generating a reproduced current corresponding to the signal, an equalizer for correcting a waveform of a reproduced signal reproduced by the read head, a distortion detector for detecting distortion of signal reproduced by the read head, thereby obtaining a distortion evaluation value, and a recording current adjusting section for adjusting a magnitude of the recording current in a direction to decrease the distortion (i.e., in a direction to decrease the recording current) on the basis of a detection output obtained by the distortion detector. An optimum recording current is always supplied to the write head in accordance with the degree of wear of the write head. The degree of wear of the head is detected upon request, and head replacement is prompted.
摘要翻译：磁记录/再现装置包括用于在磁记录介质上记录信号的写入头，用于将对应于该信号的记录电流提供给写入头的记录放大器，用于再现记录在磁记录介质上的信号的读头，用于产生与该信号相对应的再现电流的再现放大器，用于校正由读取头再现的再现信号的波形的均衡器，用于检测由读取头再现的信号的失真的失真检测器，从而获得失真评估值以及记录电流调节部分，用于基于由失真检测器获得的检测输出来调节在减小失真的方向上的记录电流的大小（即，在降低记录电流的方向上）。根据写入头的磨损程度，始终将最佳记录电流提供给写入头。根据要求检测头的磨损程度，并提示换头。

3. 发明申请

US20080291805A1 INFORMATION RECORDING/REPRODUCING APPARATUS AND INFORMATION RECORDING/REPRODUCING METHOD 审中-公开
标题翻译：信息记录/再现设备和信息记录/再现方法
公开(公告)号：US20080291805A1
公开(公告)日：2008-11-27
申请号：US12125422
申请日：2008-05-22
申请人： Yusuke Ikeda , Kazuki Azuma , Katsumi Fukuchi
发明人： Yusuke Ikeda , Kazuki Azuma , Katsumi Fukuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/0945 , G11B7/24038 , G11B27/105 , G11B2007/0006 , G11B2007/0013 , G11B2220/235 , G11B2220/2583
摘要： According to one embodiment, a start-up process performed when information is read from a hybrid disc in which two or more recording layers of different formats are integrally formed, a recording layer is limited to a specific recording layer of the hybrid disc, settings in a start-up state are changed to make it possible to execute the start-up process to read information recorded on the limited recording layer, and in the changed start-up process, information is read from the specific layer of the hybrid disc by an interface conforming to ATAPI, and a start-up time required to display or reproduce a read output is reduced.
摘要翻译：根据一个实施例，当从其中形成两种或更多种不同格式的记录层的混合盘读取信息时执行的启动处理，记录层限于混合盘的特定记录层，设置在改变启动状态，使得可以执行启动处理以读取记录在受限记录层上的信息，并且在改变的启动处理中，通过以下方式从混合盘的特定层读取信息接口符合ATAPI，减少显示或再现读取输出所需的启动时间。

4. 发明授权

US07057986B2 Recording stop processing method and data recording apparatus 失效
公开(公告)号：US07057986B2
公开(公告)日：2006-06-06
申请号：US10408128
申请日：2003-04-08
申请人： Katsumi Fukuchi
发明人： Katsumi Fukuchi
IPC分类号： G11B5/09
CPC分类号： G11B27/105 , G11B19/02 , G11B20/10527 , G11B27/034 , G11B2020/1062 , G11B2220/216 , G11B2220/218 , G11B2220/2562 , G11B2220/2575 , H04N5/76 , H04N5/781 , H04N5/85 , H04N9/8042
摘要： In a recording stop processing method according to an aspect of this invention, when a recording stop instruction is input and the data size of stream data, which is stored in a storage destination, is smaller than the predetermined data size, dummy data is added to the stream data stored in the storage destination, and the stream data with the dummy data, whose data size becomes equal to the predetermined data size, is DMA-transferred to terminate DMA transfer, thus stopping recording of stream data.

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